Essexite, tsaus grey mus rau dub, nplua-grained, intrusive igneous pob zeb uas tshwm sim hauv Essex County, Mass.; ntawm Mount Royal, ze Montreal; nyob ze Oslo, Nor. ntawm Roztoky, Czech koom pheej; thiab ntawm Carclout, Scot. … Raws li qhov kev faib ua feem ntawm nepheline nce, essexite qib rau hauv theralite.
Essexite yog dab tsi?
: granular intrusive igneous pob zeb ntawm ntau yam tsim muaj feem ntau ntawm hornblende, augite, thiab labradorite nrog cov nqi sib txawv ntawmcov khoom siv hlau, biotite, orthoclase, nepheline, lossis olivine.
pob zeb dab tsi yog gabbros?
2.4. 1Mafic Intrusive Igneous Rocks. Gabbro yog mafic intrusive coarse-grained pob zeb nrog allotriomorphic kev ntxhib los mos. Gabbros muaj tsawg silicon (tsis muaj Quartz lossis Alkali feldspar) thiab qhov tseem ceeb ntawm ferromagnesian minerals thiab Plagioclase feldspar nplua nuj hauv calcium.
Is norite a rock?
Norite yog a mafic intrusive igneous pob zeb tsim los ntawm cov calcium uas nplua nuj plagioclase labradorite, orthopyroxene, thiab olivine. Lub npe norite yog muab los ntawm Norge, lub npe Norwegian rau Norway. Norite tseem hu ua orthopyroxene gabbro.
pob zeb twg yog pob zeb muaj zog tshaj?
Lub pob zeb muaj zog tshaj plaws hauv ntiaj teb yog diabase, ua raws li los ntawm lwm cov pob zeb zoo nkauj thiab quartzite. Diabase muaj zog tshaj plaws hauv compression, nro, thiab shear stress. Yog hais tias ntxhia hardness yog qhov txiav txim siab ntawm lub zog ces pob zeb diamond yog technically tuspob zeb muaj zog tshaj plaws hauv ntiaj teb.
